> The problem is that the EU is not a country, it is a bloc. Each member state is a sovereign nation.

Yes, but

> It is up to each member state to decide how to respond to an increasingly hostile US.

is not true. A member state cannot, for example, decide that it's fine to import and sell US beef. It is perfectly possible to introduce EU laws that protect the population of Europe from the US using European banks as a weapon against law-abiding people.

> Which is why foreign actors such as US and Russia always seem to undermine the EU and foment dissent in the bloc. A unified Europe would be much harder to push around.

It's a scale. I, too, wish for a more tightly integrated Europe, but that doesn't mean there is no integration whatsoever today.